#!/bin/sh
#------------------------------------------------------------------------------
# =========                 |
# \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
#  \\    /   O peration     |
#   \\  /    A nd           | www.openfoam.com
#    \\/     M anipulation  |
#------------------------------------------------------------------------------
#     Copyright (C) 2011-2016 OpenFOAM Foundation
#     Copyright (C) 2017-2020 OpenCFD Ltd.
#------------------------------------------------------------------------------
# License
#     This file is part of OpenFOAM.
#
#     OpenFOAM is free software: you can redistribute it and/or modify it
#     under the terms of the GNU General Public License as published by
#     the Free Software Foundation, either version 3 of the License, or
#     (at your option) any later version.
#
#     OpenFOAM is distributed in the hope that it will be useful, but WITHOUT
#     ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
#     FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
#     for more details.
#
#     You should have received a copy of the GNU General Public License
#     along with OpenFOAM.  If not, see <http://www.gnu.org/licenses/>.
#
# Script
#     wclean
#
# Usage
#     wclean [OPTION] [dir]
#     wclean [OPTION] target [dir [MakeDir]]
#     wclean -subcommand ...
#
# Description
#     Clean up the wmake control directory Make/\$WM_OPTIONS and remove the
#     lnInclude directories generated for libraries.
#
#------------------------------------------------------------------------------
Script="${0##*/}"                   # Need 'Script' for wmakeFunctions messages
scriptsDir="${0%/*}"/scripts        # wmake/scripts directory
. "$scriptsDir"/wmakeFunctions      # Source wmake functions

printHelp() {
    cat<<HELP_HEAD

Usage: $Script [OPTION] [dir]
       $Script [OPTION] target [dir [MakeDir]]
       $Script -subcommand ...

options:
  -a | -all         All subdirectories, uses Allwclean, Allclean if they exist
  -s | -silent      Silent mode (ignored - for compatibility with wmake)
  -help             Display short help and exit
  -help-full        Display full help and exit

subcommands (wclean subcommand -help for more information):
HELP_HEAD

if [ -n "$1" ]
then
cat<<HELP_SUBCOMMANDS
  -build           Remove specified build/ object directories
  -platform        Remove specified platforms/ object directories
HELP_SUBCOMMANDS
else
cat<<HELP_SUBCOMMANDS
  -build -platform
HELP_SUBCOMMANDS
fi

cat<<HELP_TAIL_COMMON

Clean up the wmake control directory Make/\$WM_OPTIONS and remove the
lnInclude directories generated for libraries.

HELP_TAIL_COMMON

cat<<HELP_TAIL_FULL
Special targets:
  all               Same as -all option
  exe | lib | libo | libso
  empty             Remove empty sub-directories for the requested dir.
                    If executed in the main project directory, it will also
                    remove deprecated object directories and respective binaries
                    that refer to no-longer-existing source code.

HELP_TAIL_FULL
    exit 0 # clean exit
}

# Report error and exit
die()
{
    exec 1>&2
    echo
    echo "Error encountered:"
    while [ "$#" -ge 1 ]; do echo "    $1"; shift; done
    echo
    echo "See '${0##*/} -help' for usage"
    echo
    exit 1
}


#------------------------------------------------------------------------------
# Parse arguments and options
#------------------------------------------------------------------------------

unset dir targetType
MakeDir=Make

while [ "$#" -gt 0 ]
do
    case "$1" in
    -help-f*)   # Full help
        printHelp -full
        ;;
    -h | -help*) # Short help
        printHelp
        ;;

    # Forward to scripts/wclean-build
    -build) shift
        exec "$scriptsDir/wclean-build" "$@"
        exit $?
        ;;

    # Forward to scripts/wclean-platform
    -platform*) shift
        exec "$scriptsDir/wclean-platform" "$@"
        exit $?
        ;;

    -a | -all | all)
        targetType=all
        ;;
    -s | -silent | -quiet)
        export WM_QUIET=true
        ;;
    -*)
        die "unknown option: '$1'"
        ;;
    *)
        break
        ;;
    esac
    shift
done

#------------------------------------------------------------------------------
# Check arguments and change to the directory in which to run wclean.
# The variables 'targetType' and 'MakeDir' are considered global
#------------------------------------------------------------------------------

if [ $# -ge 1 ]
then
    if [ -d "$1" ]
    then
        dir="${1%/}"
    elif [ -f "$1" ]
    then
        dir="${1%/*}"
        : "${dir:=.}"
    else
        targetType="$1"
    fi

    # Specified directory name:
    [ $# -ge 2 ] && dir="${2%/}"

    # Specified alternative name for the Make sub-directory:
    [ $# -ge 3 ] && MakeDir="${3%/}"

    if [ -n "$dir" ]
    then
        cd "$dir" 2>/dev/null || {
            echo "$Script error: could not change to directory '$dir'" 1>&2
            exit 1
        }
    fi

    # Print command, trim off leading './' for readability
    echo "$Script $targetType${targetType:+ }${dir#./}"
fi


#------------------------------------------------------------------------------
# If target not specified search up the directory tree for the Make
# sub-directory, check the existence of the 'files' file and clean there if
# present
# ------------------------------------------------------------------------------

[ -n "$targetType" ] || cdSource


#------------------------------------------------------------------------------
# Remove empty sub-directories and exit
#------------------------------------------------------------------------------

if [ "$targetType" = empty ]
then
    # First pass: clean up empty source code directories
    echo "Removing empty directories..."

    # Get sub-directories avoiding particular directories
    for d in $(find . -mindepth 1 -maxdepth 1 \
                      -name .git -prune -o -type d -print)
    do
        echo "    searching: ${d#./}"
        find "$d" -depth -empty -type d -delete -print
    done

    # Second pass: clean up object directories with WM_PROJECT_DIR that don't
    # have respective source code folders, along with the respective binaries

    if "$scriptsDir"/wmake-check-dir "$WM_PROJECT_DIR" && \
        objectsDir=$(findObjectDir . 2>/dev/null)
    then
        if [ -d "$objectsDir" ]
        then
            echo "    Removing redundant object directories in $objectsDir"

            find "$objectsDir" -name 'variables' -print | \
            while read variablesFile
            do
                # Hack'ish way of getting the original source code path
                depFile=$(dirname $variablesFile)
                sourceFile=$(depToSource $depFile)

                # Check if the original source code directory exists
                if [ ! -r "$sourceFile" ]
                then
                    # Delete the respective binary first
                    binaryFile=$(cat $variablesFile |
                                grep -e '^ *\(EXE\|LIB\) *= *' )

                    # Catch all file extension (o,a,so,?+) for libraries
                    if echo $binaryFile | grep -qe '^ *LIB *= *'
                    then
                        binaryFile="${binaryFile}.*"
                    fi

                    # Isolate path and translate environment variables
                    binaryFile=$(echo $binaryFile | \
                                 sed -e 's/^ *\(EXE\|LIB\) *= *//' \
                                     -e 's/(/{/g' -e 's/)/}/g' )

                    # Expand environment variables for path
                    binaryFile=$(eval echo $binaryFile)

                    # Verbosely remove binary file
                    if [ -n "$binaryFile" ] && [ -e "$binaryFile" ]
                    then
                        rm -vf "$binaryFile" 2>/dev/null
                    fi

                    # Remove the deprecated object directory
                    rm -rvf "$depFile" 2>/dev/null
                fi
            done
        fi
    fi

    exit 0
fi


#------------------------------------------------------------------------------
# Recurse the directories tree
#------------------------------------------------------------------------------

unset exitCode

if [ "$targetType" = all ]
then
    if [ -e Allwclean ]       # Symmetric with Allwmake
    then
        ./Allwclean
        exitCode="$?"
    elif [ -e Allclean ]      # Tutorial cases
    then
        ./Allclean
        exitCode="$?"
    fi

    if [ -n "$exitCode" ]
    then
        exit "$exitCode"
    fi


    # For all directories containing a 'Make' directory, or an 'Allwclean' file
    for dir in $(find . -name Allwclean -o -name Make)
    do
        echo "${dir%/*}"
    done | sort | uniq | while read dir
    do
        # Use Allwclean if it exists, otherwise wclean
        if [ -e "$dir"/Allwclean ]
        then
            "$dir"/Allwclean
        elif [ -d "$dir"/Make ]
        then
            $0 "$dir"
        fi
    done
fi


#------------------------------------------------------------------------------
# Clean the 'Make' directory if present
#------------------------------------------------------------------------------

if [ -d "$MakeDir" ]
then
    objectsDir="$MakeDir/$WM_OPTIONS"
    case "$PWD" in
    ("$WM_PROJECT_DIR"/*)
        buildPath="$WM_PROJECT_DIR/build/${WM_OPTIONS}"
        objectsDir=$buildPath$(echo $PWD | sed s%$WM_PROJECT_DIR%% )
        ;;
    esac
    rm -rf "$objectsDir" 2>/dev/null
fi

#------------------------------------------------------------------------------
# Remove the lnInclude directory if present
#------------------------------------------------------------------------------

[ -d lnInclude ] && rm -rf lnInclude 2>/dev/null

exit 0 # clean exit

#------------------------------------------------------------------------------
